Another gives an insight into the 65-year-old's hair and beauty regime, which includes showing step-daughter Kim Kardashian a new dress in her wardrobe.

When the pregnant star tells Jenner that mother Kris has the same dress, she responds: "Well that figures."

The last trailer, released just a couple of weeks ago sees Jenner's mother Esther, 88, opening up about the transition, saying: "My first feeling was, 'I lost my son.' Then I thought, 'You know what? I'm gaining.'"